Stiltwalker is a system we designed to break the audio version of reCAPTCHA.
At LayerOne, the original Stiltwalker was released. However reCAPTCHA updated
its system to break Stiltwalker in the hours before our talk/release. Prior to
these changes, Stiltwalker was able to achieve an accuracy of 99.1%. This talk
will describe a narrative of the events that lead to us choosing to break the
audio version of reCAPTCHA, the methods we used to break it, the events
surrounding our LayerOne talk and reCAPTCHA's response, and most importantly how
we have worked around their response to break reCAPTCHA again after their
changes since LayerOne